Composite film and preparation method thereof

Abstract

The invention discloses a composite film and a preparation method thereof. The composite film respectively comprises a biaxially oriented polypropylene metallized film layer, an ink layer and a heat-seal film layer from top to bottom, wherein the ink layer is printed on the low surface of the biaxially oriented polypropylene metallized film layer, and the biaxially oriented polypropylene metallized film layer and the heat-seal film layer are combined through a first adhesive. The composite film is long in service life and has relatively good sanding and metallic effects, the production processis simplified, and the cost is reduced.

Description

technical field [0001] The invention relates to a composite membrane, in particular to a composite membrane and a preparation method thereof. Background technique [0002] Existing composite films with matte and metal effects are generally printed with gold and silver colors inside the film, and matte oil is printed on the surface, and a composite film is made after compounding aluminum-plated film and polyethylene film. The composite film has a frosted hue. However, there is no real matte effect when touched by hand, and the dumb oil on the surface will turn yellow after a long time, the surface is easy to get dirty, and the dumb oil will fall off after rubbing, which affects the use effect. Because the metal effect needs to be printed with gold and silver, if you want the metal effect to have a large reflection, you must add more than 30% gold powder and silver powder. The more gold and silver powder you add, it will cause a relatively large difficulty in the printing proc...

AI Technical Summary

Problems solved by technology

[0002] Existing composite films with matte and metal effects are generally printed with gold and silver colors inside the film, and matte oil is printed on the surface, and a composite film is made after compounding aluminum-plated film and polyethylene film. The composite film has a frosted hue. effect, but there is no real matte effect when touched by hand, and the dumb oil on the surface will turn yellow after a long time, the surface is easy to get dirty, and the dumb oil will fall off after rubbing, which affects the use effect

Because the metal effect needs to be printed with gold and silver, if you want the metal effect to have a large reflection, you must add more than 30% gold powder and silver powder. The more gold and silver powder you add, it will cause a relatively large difficulty in the printing process, and it is easy to appear. , It also causes great difficulties to the composite process, and crystal points are prone to appear. To solve the problem of crystal points, the amount of adhesive must be increased to fill the crystal points, thereby increasing production costs and increasing production losses.

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